Knowledge becomes more perfect in one way in the mode of science and argument, which is like going from one proposition to another to another. It becomes more perfect in another way in the mode of experience and illumination, which is like seeing the same proposition in a greater and greater light. The first mode is more communicable, the second more savored. The first is, as it were, more clear externally; the second more clear internally. The two modes are not so opposed that knowledge in one mode can’t arise from the other. There is no rigid separation of the two, but certain kinds of knowledge are more characterized by the first mode, others by the second; some kinds of knowledge go bad by overemphasizing one to the expense of the other, etc.